I have often wondered whether I could put my cats on the treadmill to lose a few pounds. Now a company has designed a pet treadmill aimed at cats and dogs. It is currently still only a prototype but looked quite interesting. It was built because the creator had an overweight cat that was unable to lose weight by changing the diet alone. One thing is not clear, how do you motivate your cat to exercise, perhaps a strategically placed out of reach biscuit?